Sad man shows off his angle bangle, with its built in protractor. He shows how he uses it to measure angles all over the world. In the warm up session the contestants sort angle into acute, obtuse and right angles. Sad Man shows how to estimate and measure angles. Bad Man has a larger protractor and he intrigues people in the street by asking them to make an obtuse angle. Back in the Great Hall the contestants have to sort angles into acute and obtuse, estimate their size, then measure them. They are successful but lose their maths card because of Bad man's mean trick at the last minute.

Viewers' Challenge

Look for angles on the keyboard of your computer – which letter has five angles – three acute and two obtuse? Which are the other three letters with obtuse angles?

Answers

Click on a letter below to choose an answer.

	a) K and b) Z, A and X
	a) A and b) K, X and Y
	a) Z and b) Y, V and K